Knob for an espresso machine



FIG. 1 is a front top left perspective view of the knob for an espresso machine, showing my new design;

FIG. 2 is a rear top right perspective view thereof, with the rear bottom right perspective view being a mirror image thereof, with the exception of the disclaimed threaded opening;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is another perspective view thereof, shown in use with a steam lever handle.

The broken lines shown in FIGS. 1-3 and 5-7 depict a groove and threaded opening of the knob that forms no part of the claimed design. The steam lever handle shown in FIG. 9 is environment and forms no part of the claimed design. 

CLAIM The ornamental design for a knob for an espresso machine, as shown and described. 